how can you compare all of them if you haven't met them (as individual characters in the books)

we cant compare the spartan IIs because we followed them more closely in the books and more individually (it was literally explained to us what Chief felt)we know more or less what their background stories were

the only thing we really know of the s-IIIs are that they were orphaned due to the covenant and besides Tom and Lucy (and a few others here and there)they were described as a group

Have they really no Feelings or the like? .__. How is thatpossible? Modification or not: They can't stop completely tobe Human, or can they? Wouldn't that be very inefficient fortheir Role as Soldiers?